﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Configuration;
using System.Web.UI;
using System.Web;
using System.Xml;
using System.IO;
using System.Web.Caching;

namespace Jy123.Common
{
    public class XmlControl
    {
        protected string strXmlFile;
        protected XmlDocument objXmlDoc = new XmlDocument();
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="XmlFile">XML位置</param>
        public XmlControl(string XmlFile)
        {
            try
            {
                objXmlDoc.Load(XmlFile);
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            strXmlFile = XmlFile;
        }

        /// <summary>
        /// 查找数据
        /// </summary>
        /// <param name="XmlPathNode">节点</param>
        /// <returns></returns>
        public DataView GetData(string XmlPathNode)
        {
            DataSet ds = new DataSet();
            StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
            ds.ReadXml(read);
            return ds.Tables[0].DefaultView;
        }
        /// <summary>
        /// 更新节点内容
        /// </summary>
        /// <param name="XmlPathNode">节点</param>
        /// <param name="Content">内容</param>
        public void Replace(string XmlPathNode, string Content)
        { 
            objXmlDoc.SelectSingleNode(XmlPathNode).InnerText = Content;
        }
        /// <summary>
        /// 删除一个节点
        /// </summary>
        /// <param name="Node">节点</param>
        public void Delete(string Node)
        { 
            string mainNode = Node.Substring(0, Node.LastIndexOf("/"));
            objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
        }

        /// <summary>
        /// 插入一个节点和词节点的一个子节点
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="ChildNode"></param>
        /// <param name="Element"></param>
        /// <param name="Content"></param>
        public void InsertNode(string MainNode, string ChildNode, string Element, string Content)
        {
            XmlNode objRootNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objChildNode = objXmlDoc.CreateElement(ChildNode);
            objRootNode.AppendChild(objChildNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objChildNode.AppendChild(objElement);
        }

        /// <summary>
        /// 插入一个节点，带一个属性
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="Element"></param>
        /// <param name="Attrib"></param>
        /// <param name="AttribContent"></param>
        /// <param name="Content"></param>
        public void InsertElement(string MainNode, string Element, string Attrib, string AttribContent, string Content)
        {
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.SetAttribute(Attrib, AttribContent);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
        }

        /// <summary>
        /// 插入一个节点不带属性
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="Element"></param>
        /// <param name="Content"></param>
        public void InsertElement(string MainNode, string Element, string Content)
        { 
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
        }

        /// <summary>
        /// 保存文档
        /// </summary>
        public void Save()
        {
            try
            {
                objXmlDoc.Save(strXmlFile);
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            objXmlDoc = null;
        }
    }

    //========================================================= 

    //实例应用： 

    //string strXmlFile = Server.MapPath("TestXml.xml"); 
    //XmlControl xmlTool = new XmlControl(strXmlFile); 

    // 数据显视 
    // dgList.DataSource = xmlTool.GetData("Book/Authors[ISBN=\"0002\"]"); 
    // dgList.DataBind(); 

    // 更新元素内容 
    // xmlTool.Replace("Book/Authors[ISBN=\"0002\"]/Content","ppppppp"); 
    // xmlTool.Save(); 

    // 添加一个新节点 
    // xmlTool.InsertNode("Book","Author","ISBN","0004"); 
    // xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Content","aaaaaaaaa"); 
    // xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Title","Sex","man","iiiiiiii"); 
    // xmlTool.Save(); 

    // 删除一个指定节点的所有内容和属性 
    // xmlTool.Delete("Book/Author[ISBN=\"0004\"]"); 
    // xmlTool.Save(); 

    // 删除一个指定节点的子节点 
    // xmlTool.Delete("Book/Authors[ISBN=\"0003\"]"); 
    // xmlTool.Save();
}
